Tool



PatentedY June 177, 1930 UNITEDSTATES A EISSU rnnnnnrcx Knosr'n, orYorin, N. Y.

Toon..

Application filed March 12,*1928. Serial No. 261,159. i

This invention relates to lcutting instruments and'in particular .to atool lon the order of a plier which is arranged to lsever the strand ofan armoured ywire covering.

without injuring the wire. f

A particular Vobject of theinvention is to provide acutter,'particularly adapted for f It is ,well known in the electricalart that .y the cutting of the BX or armoured cable` '15 heretofore, hasresultedin the cuttingof the wires or piercing ofthe wirecovering whichis objectionablebecause it exposes the bare wire and yprovides.. apossibility for short circuiting when the wire'hasvbeen placed incircuit.' y n A still further object of Atheinvention is Q provide a BXcutter in which a knife is positioned at substantially right `angles, tothe convolution of the BX so that 1t wi ll completely sever one vof thevc'onvolutions and consequently permit the BX to be separated'with aminimum of effort. Dificulty has been encountered heretofore in thecutting of the BX due to spiral winding thereof and a further obj ect ofmy invention is to provide'an anvil or bed upon which the'BX is'placedso that it will be held in the proper position relatively to the cutterso thatthe 35 strand of the BX can be easily severed'.

To enable others skilled in the art to fully comprehend the underlying'features of vmy invention that they may embody the same in the variousmodiications in struc- 4o ture and relationcontemplated, a drawingdepicting a preferredform has been annexed as a part of this disclosureVand in such drawing, similar reference characters denote correspondingparts throughout,V all V,45 the views,of which, i Y Y Figure 1 is a view1n side elevation showfV ing my' improved cutter.

Figure is a section taken on the lie of Figure 1 and illustrates how the50 anvil is yprovided with a concaved seat having a l guide groovetherein for the proper reception of the BX. v Y

-Figure 3 is V-a top plan view of the cutter, as illustrated in Figure1,'a piece of BX-or armoured cable being shown in position ready forcutting. v v

Figure l isa top plan view of the anvil or seat showing thesemi-circular receptacle formed therein for the holding of the BX and pFigure v5 is a structed after, the'same manner -as my 1mprovedy cutter,the same being. particularly'v arranged for `vuse as a wrench.;

Referringto thedrawing in detail, I5indi- Cates thev holder which` ismade of heavy sheet metal or other suitable material'and i Y 260modified view'ofA a tool con-` Y which. is substantially Ul-shaped incross section, the Awidth of the holder decreasingl fromtheto'p 6thereofv tothe lower Ved e7. The closed portion 'of the upper end o 'theholder is slightlI Aflared as at 8 to permit free operation o theCutterarm`9,'this cutter arm being pivotally supported as yat 10 on abolt 11 which passes through'the side wall of the holder 5 and'maintains therebetween in operable position, the cutter arm. The upperend of the cutter arm is bent as at12 to overhang one side oftheholder-and is again bentv at right anglesl as at 13 to'said overhang'toprovide a slotted, cutter carrying y'end 14,' the slot being indicatedby the numeral 15 while the cutter itself is indicated by the numeral16, thesame being held in the end V121 through the medium'ofsuitable'screws 17,V the upper end Vof V-the holder 5at its open side isarranged to re-4 ceive the supporting anvil 18. This anvil isv providedinv itsupper face with-an armoured cable receiving' groove ofsemi-circular f or-y mation,v the groove lbeing indicated byrv thenumeral 19 `and being that the cutter 16 desired: toV cut rkone of the'convolutions'fo'f` provided centrally i with "an upstanding Yridge 20,the groove being disposed atan angle' relatively tto the would besubstantiallyi'n alignment and' centrally thereof, that is, it vis v A'10Gk v the BX or armoured cable and to have the knife enter it at itshighest point. Therefore, it is evident that thekknife will havetobedisposed directly over the ridge 2O 'andirwill have to be central ofthe groove 19.

It is quite evident that the ridge 2O will fit into one of the spiralgrooves Vofthe BX y or armoured cable 21 and will --be securely held inposition so that the cutter 16v inay pierce bthe shell thereof. In orderthaty the movement of the cutter 16 may be limited, it will be notedthat the upper end'v of the cutter arm 9 is provided with a slightoffsetv portion 22 which is arranged to engagethe l anvil 18 andconsequently limit the down` vward vmovement of the cutter 16' so thatthe same will just pierce the shell ofthearmoured cable and will notcrush the Vwires nor break the protective coating formed thereon. f y

j In Order that the cutter arm may beheld in position so thatffthecutter 16 isV raised Vaway from the anvil, -Idiave providedbetween saidcutter armand the closedside of the holder 5, a leaf spring 23 which isse- !cured vthrough'the mediumfof the VYrivets 24C to the-holder,the-free end thereof'normally urging thefcutterarm Q'to lreepthe cutter16 in raised position4 relatively to the anvil.

j It is quite evident, therefore, that I have provided a' BX or armouredcablecutter which has few partsand one which permits v'the 'knife toVAbe removed therefrom for sharpening and'l for adjustment. 'Also, duetothe peculiar construction of the holder and 4the* cutter arm, vthemaximum effort can be exerted by one rgripping the lower end'ofthecutter aringand the 'holder because the fulcruin provided rbyy the'pivotpin 10 being near the'point oflwork, will permit a greater leverage andconsequently, more power.l

It is also evident that I have provided in y a tool of this characterananvil Yprovided ywith aL groovewhichfwill hold the BX in the properposition relatively to the cutter so that one of the convoliitionsthereof will bepierced without. danger of crushing or rpiercing the wirecovering.

wrench, greater power may be exerted and also the necessity ofadjustment of one of the jaws is eliminated.

It is evident, therefore, that I have provided a tool which isconstructed of few parts, can be made up cheaply and can be used for apluralitydof purposes.'v

VThe .lowerends of the `pivoted arms 9 v and 25 may be sharpened toprovide a screw driver end, if desired.

" While I have illustrated and described'iny VUnited States LettersPatent is y i toolv for icutting spirally .wound.`ar iiioured conduitscomprising a holder, lan anvilfin the holder having la`V transversegroove disposed at an angle to the'horizontal median line of the holder,a ridge, formed invention with some degree of particularity, I realizethat in practice Vvarious alterations in Ythe groove vand arranged ltofit' between Y' the spiral turns of the conduit, an arm pivotedintheholder and having a slotted endV overhangingthe anvil,- ai piercing toolin the slot, the tool being arranged tol cut one Y of tlieconv'olutionsAof, the conduit at a right angle tosaid convolution, and an anvilvenkgaging offset portion on the arm for limiting` the piercing movement ofsaid cutting tool. y l l f In testimony'whereof I affix my signature.

.It :is evident alsothat inyicutter construction maybe arranged for vuseasa gripping vwrench and r*to this end, .as` shown in Figure Vvsa 5,Ihave employed a pivotedarin' 25y of similar constructionkpto. thecutter arm- 9. but

which iis arrangedat its uppersendltocarry Y the jaw 2G, the under sideof which is -provided with the serrations 27which are-'arranged tolcooperate with the serrations- 29 formed on the fixed jaw-30whichlisear` ried in the upper end of the holder 3,1. 1A

suitable'spring 32 cooperates with the vholder andrcutter arm tovmaintain the aws 26 and 30 iii-their separated position.'v j 2 rDue .tothe construction .also 4of this

